<template>
	<div class="popup-result">
		<p class="title">最近5次运行时间</p>
		<ul class="popup-result-scroll">
			<template v-if='isShow'>
				<li v-for='item in resultList' :key="item">{{ item }}</li>
			</template>
			<li v-else>计算结果中...</li>
		</ul>
	</div>
</template>

<script>
export default {
    name: 'crontab-result',
    props: ['ex'],
    data() {
        return {
            dayRule: '',
            dayRuleSup: '',
            dateArr: [],
            resultList: [],
            isShow: false,
        }
    },
    watch: {
        ex: 'expressionChange'
    },
    mounted: function () {
        // 初始化 获取一次结果
        this.expressionChange();
    },
    methods: {
        // 表达式值变化时，开始去计算结果
        expressionChange() {

            // 计算开始-隐藏结果
            this.isShow = false;
            // 获取规则数组[0秒、1分、2时、3日、4月、5星期、6年]
            let ruleArr = this.$props.ex.split(' ');
            // 用于记录进入循环的次数
            let nums = 0;
            // 用于暂时存符号时间规则结果的数组
            let resultArr = [];
            // 获取当前时间精确至[年、月、日、时、分、秒]
            let nTime = new Date();
            let nYear = nTime.getFullYear();
            let nMouth = nTime.getMonth() + 1;
            let nDay = nTime.getDate();
            let nHour = nTime.getHours();
            let nMin = nTime.getMinutes();
            let nSecond = nTime.getSeconds();
            // 根据规则获取到近100年可能年数组、月数组等等
            this.getSecondArr(ruleArr[0]);
            this.getMinArr(ruleArr[1]);
            this.getHourArr(ruleArr[2]);
            this.getDayArr(ruleArr[3]);
            this.getMouthArr(ruleArr[4]);
            this.getWeekArr(ruleArr[5]);
            this.getYearArr(ruleArr[6], nYear);
            // 将获取到的数组赋值-方便使用
            let sDate = this.dateArr[0];
            let mDate = this.dateArr[1];
            let hDate = this.dateArr[2];
            let DDate = this.dateArr[3];
            let MDate = this.dateArr[4];
            let YDate = this.dateArr[5];
            // 获取当前时间在数组中的索引
            let sIdx = this.getIndex(sDate, nSecond);
            let mIdx = this.getIndex(mDate, nMin);
            let hIdx = this.getIndex(hDate, nHour);
            let DIdx = this.getIndex(DDate, nDay);
            let MIdx = this.getIndex(MDate, nMouth);
            let YIdx = this.getIndex(YDate, nYear);
            // 重置月日时分秒的函数(后面用的比较多)
            const resetSecond = function () {
                sIdx = 0;
                nSecond = sDate[sIdx]
            }
            const resetMin = function () {
                mIdx = 0;
                nMin = mDate[mIdx]
                resetSecond();
            }
            const resetHour = function () {
                hIdx = 0;
                nHour = hDate[hIdx]
                resetMin();
            }
            const resetDay = function () {
                DIdx = 0;
                nDay = DDate[DIdx]
                resetHour();
            }
            const resetMouth = function () {
                MIdx = 0;
                nMouth = MDate[MIdx]
                resetDay();
            }
            // 如果当前年份不为数组中当前值
            if (nYear !== YDate[YIdx]) {
                resetMouth();
            }
            // 如果当前月份不为数组中当前值
            if (nMouth !== MDate[MIdx]) {
                resetDay();
            }
            // 如果当前“日”不为数组中当前值
            if (nDay !== DDate[DIdx]) {
                resetHour();
            }
            // 如果当前“时”不为数组中当前值
            if (nHour !== hDate[hIdx]) {
                resetMin();
            }
            // 如果当前“分”不为数组中当前值
            if (nMin !== mDate[mIdx]) {
                resetSecond();
            }

            // 循环年份数组
            goYear: for (let Yi = YIdx; Yi < YDate.length; Yi++) {
                let YY = YDate[Yi];
                // 如果到达最大值时
                if (nMouth > MDate[MDate.length - 1]) {
                    resetMouth();
                    continue;
                }
                // 循环月份数组
                goMouth: for (let Mi = MIdx; Mi < MDate.length; Mi++) {
                    // 赋值、方便后面运算
                    let MM = MDate[Mi];
                    MM = MM < 10 ? '0' + MM : MM;
                    // 如果到达最大值时
                    if (nDay > DDate[DDate.length - 1]) {
                        resetDay();
                        if (Mi == MDate.length - 1) {
                            resetMouth();
                            continue goYear;
                        }
                        continue;
                    }
                    // 循环日期数组
                    goDay: for (let Di = DIdx; Di < DDate.length; Di++) {
                        // 赋值、方便后面运算
                        let DD = DDate[Di];
                        let thisDD = DD < 10 ? '0' + DD : DD;

                        // 如果到达最大值时
                        if (nHour > hDate[hDate.length - 1]) {
                            resetHour();
                            if (Di == DDate.length - 1) {
                                resetDay();
                                if (Mi == MDate.length - 1) {
                                    resetMouth();
                                    continue goYear;
                                }
                                continue goMouth;
                            }
                            continue;
                        }

                        // 判断日期的合法性，不合法的话也是跳出当前循环
                        if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true && this.dayRule !== 'workDay' && this.dayRule !== 'lastWeek' && this.dayRule !== 'lastDay') {
                            resetDay();
                            continue goMouth;
                        }
                        // 如果日期规则中有值时
                        if (this.dayRule == 'lastDay') {
                            //如果不是合法日期则需要将前将日期调到合法日期即月末最后一天

                            if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                while (DD > 0 && this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                    DD--;

                                    thisDD = DD < 10 ? '0' + DD : DD;
                                }
                            }
                        } else if (this.dayRule == 'workDay') {
                            //校验并调整如果是2月30号这种日期传进来时需调整至正常月底
                            if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                while (DD > 0 && this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                    DD--;
                                    thisDD = DD < 10 ? '0' + DD : DD;
                                }
                            }
                            // 获取达到条件的日期是星期X
                            let thisWeek = this.formatDate(new Date(YY + '-' + MM + '-' + thisDD + ' 00:00:00'), 'week');
                            // 当星期日时
                            if (thisWeek == 0) {
                                //先找下一个日，并判断是否为月底
                                DD++;
                                thisDD = DD < 10 ? '0' + DD : DD;
                                //判断下一日已经不是合法日期
                                if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                    DD -= 3;
                                }
                            } else if (thisWeek == 6) {
                                //当星期6时只需判断不是1号就可进行操作
                                if (this.dayRuleSup !== 1) {
                                    DD--;
                                } else {
                                    DD += 2;
                                }
                            }
                        } else if (this.dayRule == 'weekDay') {
                            //如果指定了是星期几
                            //获取当前日期是属于星期几
                            let thisWeek = this.formatDate(new Date(YY + '-' + MM + '-' + DD + ' 00:00:00'), 'week');
                            //校验当前星期是否在星期池（dayRuleSup）中
                            if (Array.indexOf(this.dayRuleSup, thisWeek) < 0) {
                                // 如果到达最大值时
                                if (Di == DDate.length - 1) {
                                    resetDay();
                                    if (Mi == MDate.length - 1) {
                                        resetMouth();
                                        continue goYear;
                                    }
                                    continue goMouth;
                                }
                                continue;
                            }
                        } else if (this.dayRule == 'assWeek') {
                            //如果指定了是第几周的星期几
                            //获取每月1号是属于星期几
                            let thisWeek = this.formatDate(new Date(YY + '-' + MM + '-' + DD + ' 00:00:00'), 'week');
                            if (this.dayRuleSup[1] >= thisWeek) {
                                DD = (this.dayRuleSup[0] - 1) * 7 + this.dayRuleSup[1] - thisWeek + 1;
                            } else {
                                DD = this.dayRuleSup[0] * 7 + this.dayRuleSup[1] - thisWeek + 1;
                            }
                        } else if (this.dayRule == 'lastWeek') {
                            //如果指定了每月最后一个星期几
                            //校验并调整如果是2月30号这种日期传进来时需调整至正常月底
                            if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                while (DD > 0 && this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                    DD--;
                                    thisDD = DD < 10 ? '0' + DD : DD;
                                }
                            }
                            //获取月末最后一天是星期几
                            let thisWeek = this.formatDate(new Date(YY + '-' + MM + '-' + thisDD + ' 00:00:00'), 'week');
                            //找到要求中最近的那个星期几
                            if (this.dayRuleSup < thisWeek) {
                                DD -= thisWeek - this.dayRuleSup;
                            } else if (this.dayRuleSup > thisWeek) {
                                DD -= 7 - (this.dayRuleSup - thisWeek)
                            }
                        }
                        // 判断时间值是否小于10置换成“05”这种格式
                        DD = DD < 10 ? '0' + DD : DD;

                        // 循环“时”数组
                        goHour: for (let hi = hIdx; hi < hDate.length; hi++) {
                            let hh = hDate[hi] < 10 ? '0' + hDate[hi] : hDate[hi]

                            // 如果到达最大值时
                            if (nMin > mDate[mDate.length - 1]) {
                                resetMin();
                                if (hi == hDate.length - 1) {
                                    resetHour();
                                    if (Di == DDate.length - 1) {
                                        resetDay();
                                        if (Mi == MDate.length - 1) {
                                            resetMouth();
                                            continue goYear;
                                        }
                                        continue goMouth;
                                    }
                                    continue goDay;
                                }
                                continue;
                            }
                            // 循环"分"数组
                            goMin: for (let mi = mIdx; mi < mDate.length; mi++) {
                                let mm = mDate[mi] < 10 ? '0' + mDate[mi] : mDate[mi];

                                // 如果到达最大值时
                                if (nSecond > sDate[sDate.length - 1]) {
                                    resetSecond();
                                    if (mi == mDate.length - 1) {
                                        resetMin();
                                        if (hi == hDate.length - 1) {
                                            resetHour();
                                            if (Di == DDate.length - 1) {
                                                resetDay();
                                                if (Mi == MDate.length - 1) {
                                                    resetMouth();
                                                    continue goYear;
                                                }
                                                continue goMouth;
                                            }
                                            continue goDay;
                                        }
                                        continue goHour;
                                    }
                                    continue;
                                }
                                // 循环"秒"数组
                                goSecond: for (let si = sIdx; si <= sDate.length - 1; si++) {
                                    let ss = sDate[si] < 10 ? '0' + sDate[si] : sDate[si];
                                    // 添加当前时间（时间合法性在日期循环时已经判断）
                                    if (MM !== '00' && DD !== '00') {
                                        resultArr.push(YY + '-' + MM + '-' + DD + ' ' + hh + ':' + mm + ':' + ss)
                                        nums++;
                                    }
                                    //如果条数满了就退出循环
                                    if (nums == 5) break goYear;
                                    //如果到达最大值时
                                    if (si == sDate.length - 1) {
                                        resetSecond();
                                        if (mi == mDate.length - 1) {
                                            resetMin();
                                            if (hi == hDate.length - 1) {
                                                resetHour();
                                                if (Di == DDate.length - 1) {
                                                    resetDay();
                                                    if (Mi == MDate.length - 1) {
                                                        resetMouth();
                                                        continue goYear;
                                                    }
                                                    continue goMouth;
                                                }
                                                continue goDay;
                                            }
                                            continue goHour;
                                        }
                                        continue goMin;
                                    }
                                } //goSecond
                            } //goMin
                        }//goHour
                    }//goDay
                }//goMouth
            }
            // 判断100年内的结果条数
            if (resultArr.length == 0) {
                this.resultList = ['没有达到条件的结果！'];
            } else {
                this.resultList = resultArr;
                if (resultArr.length !== 5) {
                    this.resultList.push('最近100年内只有上面' + resultArr.length + '条结果！')
                }
            }
            // 计算完成-显示结果
            this.isShow = true;


        },
        //用于计算某位数字在数组中的索引
        getIndex(arr, value) {
            if (value <= arr[0] || value > arr[arr.length - 1]) {
                return 0;
            } else {
                for (let i = 0; i < arr.length - 1; i++) {
                    if (value > arr[i] && value <= arr[i + 1]) {
                        return i + 1;
                    }
                }
            }
        },
        // 获取"年"数组
        getYearArr(rule, year) {
            this.dateArr[5] = this.getOrderArr(year, year + 100);
            if (rule !== undefined) {
                if (rule.indexOf('-') >= 0) {
                    this.dateArr[5] = this.getCycleArr(rule, year + 100, false)
                } else if (rule.indexOf('/') >= 0) {
                    this.dateArr[5] = this.getAverageArr(rule, year + 100)
                } else if (rule !== '*') {
                    this.dateArr[5] = this.getAssignArr(rule)
                }
            }
        },
        // 获取"月"数组
        getMouthArr(rule) {
            this.dateArr[4] = this.getOrderArr(1, 12);
            if (rule.indexOf('-') >= 0) {
                this.dateArr[4] = this.getCycleArr(rule, 12, false)
            } else if (rule.indexOf('/') >= 0) {
                this.dateArr[4] = this.getAverageArr(rule, 12)
            } else if (rule !== '*') {
                this.dateArr[4] = this.getAssignArr(rule)
            }
        },
        // 获取"日"数组-主要为日期规则
        getWeekArr(rule) {
            //只有当日期规则的两个值均为“”时则表达日期是有选项的
            if (this.dayRule == '' && this.dayRuleSup == '') {
                if (rule.indexOf('-') >= 0) {
                    this.dayRule = 'weekDay';
                    this.dayRuleSup = this.getCycleArr(rule, 7, false)
                } else if (rule.indexOf('#') >= 0) {
                    this.dayRule = 'assWeek';
                    let matchRule = rule.match(/[0-9]{1}/g);
                    this.dayRuleSup = [Number(matchRule[0]), Number(matchRule[1])];
                    this.dateArr[3] = [1];
                    if (this.dayRuleSup[1] == 7) {
                        this.dayRuleSup[1] = 0;
                    }
                } else if (rule.indexOf('L') >= 0) {
                    this.dayRule = 'lastWeek';
                    this.dayRuleSup = Number(rule.match(/[0-9]{1,2}/g)[0]);
                    this.dateArr[3] = [31];
                    if (this.dayRuleSup == 7) {
                        this.dayRuleSup = 0;
                    }
                } else if (rule !== '*' && rule !== '?') {
                    this.dayRule = 'weekDay';
                    this.dayRuleSup = this.getAssignArr(rule)
                }
                //如果weekDay时将7调整为0【week值0即是星期日】
                if (this.dayRule == 'weekDay') {
                    for (let i = 0; i < this.dayRuleSup.length; i++) {
                        if (this.dayRuleSup[i] == 7) {
                            this.dayRuleSup[i] = 0;
                        }
                    }
                }
            }
        },
        // 获取"日"数组-少量为日期规则
        getDayArr(rule) {
            this.dateArr[3] = this.getOrderArr(1, 31);
            this.dayRule = '';
            this.dayRuleSup = '';
            if (rule.indexOf('-') >= 0) {
                this.dateArr[3] = this.getCycleArr(rule, 31, false)
                this.dayRuleSup = 'null';
            } else if (rule.indexOf('/') >= 0) {
                this.dateArr[3] = this.getAverageArr(rule, 31)
                this.dayRuleSup = 'null';
            } else if (rule.indexOf('W') >= 0) {
                this.dayRule = 'workDay';
                this.dayRuleSup = Number(rule.match(/[0-9]{1,2}/g)[0]);
                this.dateArr[3] = [this.dayRuleSup];
            } else if (rule.indexOf('L') >= 0) {
                this.dayRule = 'lastDay';
                this.dayRuleSup = 'null';
                this.dateArr[3] = [31];
            } else if (rule !== '*' && rule !== '?') {
                this.dateArr[3] = this.getAssignArr(rule)
                this.dayRuleSup = 'null';
            } else if (rule == '*') {
                this.dayRuleSup = 'null';
            }
        },
        // 获取"时"数组
        getHourArr(rule) {
            this.dateArr[2] = this.getOrderArr(0, 23);
            if (rule.indexOf('-') >= 0) {
                this.dateArr[2] = this.getCycleArr(rule, 24, true)
            } else if (rule.indexOf('/') >= 0) {
                this.dateArr[2] = this.getAverageArr(rule, 23)
            } else if (rule !== '*') {
                this.dateArr[2] = this.getAssignArr(rule)
            }
        },
        // 获取"分"数组
        getMinArr(rule) {
            this.dateArr[1] = this.getOrderArr(0, 59);
            if (rule.indexOf('-') >= 0) {
                this.dateArr[1] = this.getCycleArr(rule, 60, true)
            } else if (rule.indexOf('/') >= 0) {
                this.dateArr[1] = this.getAverageArr(rule, 59)
            } else if (rule !== '*') {
                this.dateArr[1] = this.getAssignArr(rule)
            }
        },
        // 获取"秒"数组
        getSecondArr(rule) {
            this.dateArr[0] = this.getOrderArr(0, 59);
            if (rule.indexOf('-') >= 0) {
                this.dateArr[0] = this.getCycleArr(rule, 60, true)
            } else if (rule.indexOf('/') >= 0) {
                this.dateArr[0] = this.getAverageArr(rule, 59)
            } else if (rule !== '*') {
                this.dateArr[0] = this.getAssignArr(rule)
            }
        },
        // 根据传进来的min-max返回一个顺序的数组
        getOrderArr(min, max) {
            let arr = [];
            for (let i = min; i <= max; i++) {
                arr.push(i);
            }
            return arr;
        },
        // 根据规则中指定的零散值返回一个数组
        getAssignArr(rule) {
            let arr = [];
            let assiginArr = rule.split(',');
            for (let i = 0; i < assiginArr.length; i++) {
                arr[i] = Number(assiginArr[i])
            }
            arr.sort(this.compare)
            return arr;
        },
        // 根据一定算术规则计算返回一个数组
        getAverageArr(rule, limit) {
            let arr = [];
            let agArr = rule.split('/');
            let min = Number(agArr[0]);
            let step = Number(agArr[1]);
            while (min <= limit) {
                arr.push(min);
                min += step;
            }
            return arr;
        },
        // 根据规则返回一个具有周期性的数组
        getCycleArr(rule, limit, status) {
            //status--表示是否从0开始（则从1开始）
            let arr = [];
            let cycleArr = rule.split('-');
            let min = Number(cycleArr[0]);
            let max = Number(cycleArr[1]);
            if (min > max) {
                max += limit;
            }
            for (let i = min; i <= max; i++) {
                let add = 0;
                if (status == false && i % limit == 0) {
                    add = limit;
                }
                arr.push(Math.round(i % limit + add))
            }
            arr.sort(this.compare)
            return arr;
        },
        //比较数字大小（用于Array.sort）
        compare(value1, value2) {
            if (value2 - value1 > 0) {
                return -1;
            } else {
                return 1;
            }
        },
        // 格式化日期格式如：2017-9-19 18:04:33
        formatDate(value, type) {
            // 计算日期相关值
            let time = typeof value == 'number' ? new Date(value) : value;
            let Y = time.getFullYear();
            let M = time.getMonth() + 1;
            let D = time.getDate();
            let h = time.getHours();
            let m = time.getMinutes();
            let s = time.getSeconds();
            let week = time.getDay();
            // 如果传递了type的话
            if (type == undefined) {
                return Y + '-' + (M < 10 ? '0' + M : M) + '-' + (D < 10 ? '0' + D : D) + ' ' + (h < 10 ? '0' + h : h) + ':' + (m < 10 ? '0' + m : m) + ':' + (s < 10 ? '0' + s : s);
            } else if (type == 'week') {
                return week;
            }
        },
        // 检查日期是否存在
        checkDate(value) {
            let time = new Date(value);
            let format = this.formatDate(time)
            return value == format ? true : false;
        }
    }
}

</script>